DE2647703A1 - METHOD AND DEVICE FOR ASSEMBLING FRICTION COUPLINGS - Google Patents

Description

PATENT Attorneys £ U 4 / / U d

Diploma Phys. JÜRGEN WEISSE. Dipl.-Chem. Dr. RUDOLF WOLGAST

D 5620 VELBERT 11-LANGENBERG · BÖKENBUSCH 41 P.O. Box 110386. Telephone: (02127) 4019. Telex: 8516895

Patent application

Automotive Products Limited at Tachbrook Road, Leamington Spa, Warwickshire, England

Method and device for assembling friction clutches

The invention relates to a method for assembling a Subgroup of a plate spring friction clutch, the subgroup of which consists of a clutch cover and a plate spring a plurality of radially inwardly directed tongues, which near the radially outer ends of the tongues on the Clutch cover is supported by a large number of projections, which extend from the clutch cover through Slots extend between adjacent tongues and detect the disc spring, in which process the disc spring leveled and each projection for holding the plate spring on the clutch cover by means of a molding tool is bent radially outwards. -

The invention also relates to a device for carrying out such a method with a device for leveling the plate spring and a mold for radially outward bending of the projections, whereby the Disk spring is held on the clutch cover.

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Disk spring friction clutches of the aforementioned type consist of a clutch cover which is set up so that it can be connected to a drive element such as a flywheel of the engine, a disk spring with a plurality of radially inwardly directed tongues and a pressure plate which is driven in rotation together with the drive element and engages an output member under load from the plate spring near its radial outer circumference, the plate spring close to the radial outer ends of its tongues aax the. Clutch cover supported »The clutch is released again by applying pressure on the inner ends of the tongues of the disc spring, which is directed axially in the direction of the drive member. When assembling such a diaphragm spring friction clutch, the assembly of a sub-group, which consists of the diaphragm spring and the clutch cover, plays a special role.

In a plate spring friction clutch of the type described above, the plate spring is supported on the clutch cover by projections and is thereby in its Position held on the clutch cover. The protrusions extend from the clutch cover through slots through between adjacent tongues of the plate spring; These jumps are radially outward during assembly bent over and so support the disc spring on its opposite side on the clutch cover on both sides of the disc spring pivot rings can be provided over which the. Disc spring is held by the projections. However, Ss has proven to be proved difficult to bend the projections so that they hold the plate spring exactly in place. Without one However, the exact position of the diaphragm spring does not lie against the pressure plate evenly, so that the clutch only engages intermittently and e.g. jerky starting is caused. Furthermore, the pressure plate does not move sufficiently for complete separation from the drive member when the spring is not firmly held by the clutch cover,

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because the force that the diaphragm spring exerts on the clutch cover changes from a value, that of the gripping load is the same on the drive member and counteracts a counterforce acting in a certain direction, to a value which is equal to the release load at the radially inner ends of the tongues of the disc spring and which counteracts an oppositely directed counterforce. If the spring is not held firmly, it will deteriorate The operation of the clutch changes rapidly by the fact that the plate spring and the other components of the clutch are attached to one another chafing, especially on motor vehicles where the drive position is subject to torsional vibrations.

The object of the invention is to provide a method and a device for assembling the aforementioned subgroup specify a plate spring friction clutch, through which the safe and precise mounting of the plate spring on the Coupling deekel is guaranteed.

According to the method according to the invention, this object is achieved in that the clutch cover with the axis of the Belleville washer parallel protrusions is preformed and each protrusion in the area by going through the disc spring runs therethrough, during its radially outward bending against a radially inward displacement is held.

The molding tool is expediently pressed against the plate spring in the axial direction, preferably all projections at the same time by a single molding tool be bent, which can be spring-loaded with an annular punch connected to the plate spring level before bending over the projections.

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According to the invention, the projections are in their mutual position fixed stop members supported, which are connected to the mold or with the support for the clutch cover can be connected. The projections can, however, also be carried out by means of trailing elements connected to the molding tool are in operative connection, are held in the holding position displaceable stop members.

In the case of a sub-group with a link ring made of wire on the opposite side of the clutch cover Disk spring, which is detected by the projections after the bending, is the pivot ring according to the invention during the bending of the projections held against a radially outward displacement. Preferably support stop surfaces from the pivot ring opposite the areas that are covered by the projections. Included the articulation ring can be circumferentially spaced from one another in relation to the areas covered by the projections formed on a retaining ring claws are held and the support ring after the bending of the projections and after Rotation into a position in which the recesses between the claws are aligned with the projections on the projections be peeled off over. The pivot ring can, however, also be provided with abutments in relation to the areas covered by the projections are held, which are brought into position by trailing elements in operative connection with the molding tool will*

The device according to the invention consists in that stop members are provided that the projections in the areas in which they extend through the plate spring while hold the radially outward bend against a radially inward displacement. Here is that Mold for bending the projections expediently movable in the axial direction with respect to the plate spring, and it is preferably a single mold for simultaneous

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Bending of all projections provided, with an annular punch, which is spring-loaded with the molding tool connected, can be provided to level the plate spring before the projections in their final shape be bent.

According to the invention, the stop members are in a mutually fixed position. You can do this with the molding tool or with the support for the clutch cover be connected. The stop members can also each hold a projection in one position, and it trailing elements which are in operative connection with the molding tool can be provided for adjusting the stop elements.

For a subgroup with a hinge ring made of wire on the side of the plate spring opposite the clutch cover, which is gripped by the projections after being bent is, it is provided according to the invention that brackets against the pivot ring during the bending of the projections support a radial outward displacement. The holders preferably consist of stop surfaces which hold the pivot ring in relation to the areas gripped by the projections. According to the invention the holder can be formed by claws formed circumferentially at a distance from one another on a holding ring, which Limit recesses, which are used to pull off the retaining ring over the bent projections after it has been rotated aligned with the projections opposite the clutch cover are. The retaining ring can then be carried by the annular punch. The holder can also be formed by abutments, and it can be with the mold operatively connected trailing elements can be provided in order to bring the abutments into their respective working positions. It is not practical to use the pivot ring against a radially outward movement in relation to the areas

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which are gripped by the projections to hold while the protrusions are bent to their final shape. However, it has been found that after a bend of the projections by approx. 55 while at the same time holding the pivot ring against a radially outwardly directed Movement a further bending of the projections into their final shape without further support of the pivot ring can be made against a radially outward movement.

Embodiments of the invention are shown in the figures and are referred to below with reference to the reference numerals explained and described in detail. Show it

Fig. 1 is a plan view of an assembled according to the invention plate spring friction clutch j

FIG. 2 shows a section along the line II-II in FIG

Fig. 3 is a sectional view of a first embodiment of the device according to the invention with certain parts of the coupling shown in FIGS in a pre-assembly position;

FIG. K shows a view similar to FIG. 3 after completion of the first stage of the method according to the invention;

Fig. 5 is a view similar to FIG. 3 after the expiry of the second stage of the process according to the invention;

6 is a sectional view of that shown in FIGS. 3-5 Apparatus with a modification after a further stage of the method according to the invention ;

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7 shows a sectional view of a second embodiment of the device according to the invention with the in Fig. 3 to 6 shown coupling parts at the same stage of assembly as in Fig. 55

8 shows a third embodiment of the invention Device with the coupling parts shown in Fig. 3 to 7 Darge in their position the assembly;

FIG. 9 is a view similar to FIG. 8 after the expiry of FIG

first stage of the process according to the invention;

FIG. 10 is a view similar to FIG. 8 after the expiry of FIG

last stage of the process according to the invention.

The assembled disc spring friction clutch shown in FIGS. 1 and 2 consists of a clutch cover 11 made of pressed sheet steel, which can be fastened to a drive member in the form of the engine flywheel 12 with bolts. A pressure plate 13 is driven in rotation together with the flywheel 12 by three tangentially extending brackets Ik which are riveted to projections 15 of the pressure plate 13 and to the clutch cover 11. A plate spring 16 is held on the clutch cover 11 by projections 17 'which are formed from one part with the clutch cover 11 and extend from the clutch cover 11 through slots 18 between adjacent tongues 19 of the plate spring 16 and are held in place. During the assembly of the clutch, the projections 17 have been bent radially outward in order to hold a pivot ring 21 on the side of the plate spring 16 opposite the clutch cover 11; a second pivot ring 2k is located between the plate spring l6 and the clutch cover 11. The

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Disk spring l6 loads the pressure plate 13 near its radial outer circumference, so that the output plate 22 is pressed against the flywheel 12. The output plate 22 is released in that the radial inner ends of the Tongues 19 of the plate spring 16 via a release bearing 23 in Direction on the flywheel 12 are loaded.

According to FIGS. 3 to 5, the clutch cover 11, the plate spring l6 and the pivot rings 21, 24 on the support 25 one first embodiment of the device for assembling this Clutch components are arranged in a subgroup of the diaphragm spring friction clutch shown in FIGS. 1 and 2. Of the Clutch cover 11 is shown in a form in which he after pressing, the projections 17 projecting therefrom in a direction which is substantially parallel to the axis 3 ° of the plate spring 16 when the plate spring 16 is arranged so that the projections 17 extend through the slots.

The clutch cover 11 is held in place by pins 26 in three guide holes 27, the pins 26 being supported by supports 28 are held on the support 25. Sin educated in one piece The support ring 29 on the support 25 has crown-like stop members 31 which extend through the slots 18 in the plate spring l6 extend through to center it and in front of it in its correct circumferential position to hold the assembly.

The support 25 is set up so that it can be connected to the floor cushion of a vertical press. Another plate 32 is designed so that it can be connected to the upper beam of the press and by means of a bearing block 33 carries a molding tool ^ k.

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The upper plate 32 also has an annular ram 35 'which is spring-loaded in the downward direction by six springs 36 arranged circumferentially at a distance from one another. Three circumferentially spaced head bolts 37 screwed into the upper plate 32 guide the annular punch 35 in correspondingly stepped bores 38 and hold it against the bias by the springs 36 39 formed recess forms a sliding bracket for a retaining ring 4l. The retaining ring 4l is spring-loaded in the downward direction by six circumferentially spaced apart helical springs 42, its movement being limited by three circumferentially spaced apart pins 43 which are screwed into the retaining ring 4l and slide in corresponding vertical slots kk in the annular projection 39 .

Twelve claws 45 circumferentially spaced apart from one another on the retaining ring kl are aligned radially to the projections 17, the projections 17 and the claws 45 being aligned to form twelve grooves 46 with parallel sides in the retaining ring kl . The molding tool 34 also has twelve grooves 47 with parallel sides which are offset at an angle with respect to the grooves 46, so that the molding tool 34 can slide through the retaining ring kl. The grooves 47 in the molding tool define longitudinal ribs 48, each of which has an angled end face 49 which is aligned with one of the projections.

In Fig. 3 the parts of the coupling are shown in their position prior to assembly, but with the top plate and the parts connected to it have already been shifted slightly against the support 25. With continuous movement of the upper plate 32, the annular projection 39 of the punch 35 and the retaining ring 4l abut against the plate spring

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However, the bias of the springs 36 is so great that the annular plunger 35 'with the upper plate 32 continues to move downwards, so that the plate spring 16 is off their conical shape shown in FIG. 3 into that in FIG. 4 illustrated planarized shape is deformed. Adjustable stops 51 on support 25 abut against blocks 52 on the annular punch 35 »around a deformation of the plate spring 16 to prevent beyond the leveled shape. During the deformation of the disc spring l6 the slides Retaining ring 4l in the recess formed by the annular projection 39 against a relatively small, of the counterforce applied to the springs 42.

With further downward movement of the upper plate 32, the springs 36 are compressed and the annular plunger is held in place by the stops 51. The bearing block and the molding tool 34 move through the annular punch 35, and the angled end faces 49 of the molding tool 34 abut the projections 17 'so that each projection 17 is bent at an angle of approximately 55 on the adjacent area of the pivot ring 21 will. During the bending of the projections 17, the articulation ring is held against a radially outward displacement by stop surfaces on the radial inner sides of the claws 45 of the retaining ring 4l, the claws 45 holding the articulation ring 21 in the areas that are covered by the projections 17 opposite. The projections 17 themselves are held in the areas in which they extend through the slots 18 in the plate spring 16 against a radially inward movement during bending by the crown-like stop members 31 on the stationary retaining ring 29. As shown in FIG. 5 , the plate spring 16 is firmly enclosed by the projections 17 between the two articulation rings 21, 24, the projections 17 and the articulation ring 21 already being arranged for the next process step} to avoid overstretching the projections 17 serves a

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Stop 53 »which limits the press stroke by a stop on the forming tool Jk.

In raising the press the mold 3k and the bearing block 33 by the annular plunger 35 slide in their in Fig. Back position shown k. With further upward movement of the upper plate 32, however, the subgroup of the clutch cover 11, the plate spring 16 and the two pivot rings 21, 2k is taken up by the retaining ring kl that the projections 17 have been bent around the claws k5. Since the clutch cover is then free of the retaining pins 26, the subgroup can be rotated by about 15, so that the projections are then aligned with the recesses 46 formed between the claws k5 and the subgroup can be removed from the device.

The device shown in Fig. 6 differs from the device shown in Fig. 3 to 5 by a different molding tool 5k that replaces the molding tool 3k and the retaining ring 29, the retaining ring kl and the stop 53 have been removed. The molding tool 5k is similar to the molding tool 3k, but the end faces 55 corresponding to the end faces k9 are designed in such a way that they correspond to the final shape of the projection 17. The surfaces 55 merge into crown-like stop members 56 on the underside of the molding tool 5k in order to hold the projections 17 in the area in which they penetrate the plate spring 16. When the device is in operation, the plate spring 16 is leveled by the annular punch 35, the stop members 56 extend through the plate spring 16 to hold the projections 17 and the projections 17 pass over the adjacent areas of the pivot ring 21 in the position shown in FIG the molding surfaces 55 on the molding tool 5k are bent over further. This makes the assembly of the subgroup from the

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Clutch cover 11, the plate spring l6 and the two pivot rings 21, 24 completed.

In a modification of the device shown in FIGS. 3 to 5, the springs 42 and the pins 43 can be omitted so that the retaining ring 4l represents a loose component that is in its position before the pressing process the plate spring 16 is attached. The sequence of operations is the same as described above, however, after the pressing process has ended and when the upper plate 32 is raised, the retaining ring 4l remains in its place Position on the coupling part group, which itself retains its position on the support 25. The retaining ring 4l can then be rotated by an angle of approx. 15 and then removed from the sub-group of the coupling that is ready even for the further operation described in connection with FIG.

In a second embodiment of the device described above, which is shown in FIG. 7, the clutch cover 11 rests on a support 61 with a retaining ring 62 which is identical to the retaining ring 29. The support 6l is set up so that it can be received by the floor cushion of a vertical press. A plate 63 is carried by the upper beam of the press and, via an intermediate plate 64 and a bearing plate 65, holds a forming tool 66 similar to the forming tool Jk.

The intermediate plate 64 carries a guide ring 67 for a annular ram 68, which by six circumferentially spaced apart springs 69 in the downward direction is resiliently biased. The ring-shaped punch 68 has twelve abutments 71 'each of which is free in one of twelve circumferentially spaced apart recesses in the annular punch 68 and slidably by grooves 72 in the side walls of the recesses and corresponding tongues 73 is guided in the abutments 71.

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In the position shown in FIG. 7, the press has reached its lower end position, which is determined by blocks 7k connected to the guide ring 67; the projections 17 have been deformed by the molding tool 66 in the manner described in connection with FIGS. During the deformation, the retaining ring 62 prevented a radially inward displacement of the projections 17 in the areas in which they pass through the plate spring 16, and the abutments 71 held the adjacent areas of the pivot ring 21 against a radially outward displacement.

The operation of the apparatus shown in FIG. 7 will be apparent from a description of the sequence of movement of its various parts as the upper beam 63 is raised from the position shown in FIG. In this position, the abutments 71 hold the pivot ring 21 in that the opposite end face of the abutments 71 of the bore of the guide ring 67 rests. When the upper plate 63 is raised, it takes the intermediate plate 6k, the bearing plate 65, the molding tool 66 and the guide ring 67 with it, while the annular ram 68 and the abutments 71 keep their position because the springs 69 abut the annular ram 68 hold the adjustable stops 75 which correspond to the adjustable stops shown in FIGS. 3-5. The blocks 7k limit a displacement of the annular ram 68 with respect to the guide ring 69. However, before the blocks 7k hit the annular punch 68, the abutments 71 slide radially outward under the influence of the respective spring 76, with an angled part 78 on the end face of the abutment on the side of the guide ring 67 and a widening one cooperating therewith Bore part 77 in the guide ring 67 form suitable follow-up members for this purpose. The springs are supported on the cylinder surface of the bearing plate 65 and on the molding tool 76 via a sliding piston.

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A third embodiment of the device is shown in Fig. _T to 10 and allows the assembly of the clutch cover 11, the plate spring 16 and the coupling rings 21, 24 in one work step, without the need for a further device of the type shown in Fig. 6 is shown. The device consists of a support 81 which can be connected to the bottom cushion of a vertical press, and an upper plate 82 which can be connected to the upper beam of the press. On the support 8l there is a support plate 83 for the compression mold of the clutch cover 11, which by three pins 84 in guide holes 2? each of which is connected to a block 85 which is itself attached to the support plate 83.

In the illustration of FIG. 8, the clutch cover 11 has the shape which it assumes after pressing, with the projections 17 of which protrude in a direction which is essentially parallel to the axis 30 of the plate spring l6, which has been brought into position together with the pivot rings 21, 24. Twelve block-like, trapezoidal in plan view Stop members 86 are located in slots with parallel sides, which are formed by crown-like elevations 87 a ring 88 are formed, which is connected to the support 8l is. The elevations 87 are so far apart from one another that the trapezoidal stop members 86 extend through the slots l8 of the plate spring l6, for which purpose each stop member 86 has a narrow rib 89 is provided. On the radial outside 92fce sit the Stop members 86 grooves 91j with an in section rectangular projection 93 cooperate on a guide ring 94, which is attached to the ring 88 provided with the elevations to the stop members 86 against a Secure vertical displacement.

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The trapezoidal stop members 86 are biased in the radial direction inward by springs 90, the are supported on pin 100, so that the inclined surfaces 95 of the conical tapered surface 96 of a tapered Pin 97 rest. The tapered pin 97 is formed by a helical spring which is rectangular in section 98 biased upward; the spring 98 is located in a central hole in the support 8l and is supported on a plate 99 which is attached to the underside of the support 8l is fixed in a recess. Upward movement of the tapered pin 97 is enabled by a pin limited, which has a threaded part 102, which with a corresponding threaded part IO3 in a stepped bore of the tapered pin 97 cooperates. The pin 101 extends through the plate 99 and is through held a head ΙΟΊ. The pin 101 is in its axial position adjustable with respect to the tapering pin 97 through the interaction of the threads 102, 103, wherein by a screw 105 a determination takes place, the one Stop 106 against a cylindrical extension IO7 of the tapered pin 107 pulls. With a grub screw IO8, the protruding part IO9 of which in a longitudinal groove 111 of the pin 101 is slidably fitted, the pin 101 is prevented from rotating within the plate 99.

An annular punch 112 is by a circumferential arrangement of in section rectangular springs 113 of the upper plate 82 is biased downward and is in the position shown in Fig. 8 by a number of Pins 114: graduated diameter held that on of the upper plate 82 and lie in correspondingly stepped bores 115 in the punch 112. Of the annular punch 112 has an annular projection with twelve claws 117 on its inside. The claws cooperate with twelve in section rectangular ribs II8 on the outer surface of a molding tool 119, which has a

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Retaining block 121 is attached to the top plate 82.

The molding tool 119 has a through threaded bore 122 for receiving one with a corresponding end Threaded cylinder housing 123 for an im Section rectangular spring 124 through which the head 125 of a pin 126, which is in a through hole 127 of the housing 123 is guided and held by a nut 128, is provided with a preload.

With a downward movement of the upper plate 82 in the direction of the support 8l of the vertical press, the ring-shaped one hits Projection II6 on the annular punch 112 on the plate spring 16 and levels it, as in FIG. 9 is shown. Through the blocks 129 on the annular punch 112, the adjustable stops 131 on the annular Contact the support plate 83, deformation of the plate spring 16 beyond the leveled state is prevented. At the same time as the plate spring is leveled, the pivot ring 21 is positioned opposite the clutch cover 11 Side of the plate spring 16 held in a V-shaped groove 132 on the underside of the claws 117. While the leveling of the plate spring 16 by the annular punch 112 pushes the head 125 of the resiliently preloaded Pin 126 against the stop IO6 at the end of the tapered pin 97 and moves this down against the Force of the spring 98, since the preload of the spring 124 is greater than that of the spring 98. The tapering pin 97 acts together with the inclined surfaces 95 on the stop members 86 as a follower device through which the trapezoidal stop members 86 are displaced radially outward so that the stop members 86 over their Page 92 abut the projections 17 in the area in which they push through the slots l8 on the plate spring l6. Although the stop members 86 are shown in FIG. 9, that it is moved to the projections 17 until it rests

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have been, it is not necessary that this happens at the same time as the leveling of the disc spring 16, because the mold 119 moves with the top plate 82 further downward, while the annular punch 112 remains in the position determined by the adjustable stops 131, so that the pin 126 also the tapered pin 97 continues to move until the resistance caused by the abutment of the stop members is caused on the projections 17, is sufficient to compress the spring 124.

With further downward movement of the mold 119 and after the trapezoidal stop members 86 come into contact with the projections 17, the free ends of the projections 17 abut to the profiled underside 133 of the ribs 118, so that the projections 17 are bent over into the shape shown in FIG will. During the bending process, the stop ring 21 is through the V-shaped grooves 132 in the annular The punch 112 is held against a radially outward displacement and the projections are in the area in which they pass through the slot 18 of the plate spring 16, through the stop surfaces 92 on the trapezoidal stop members 86 supported against a radially inward movement.

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Claims (1)

Claims 1.) Procedure for assembling a subset of a Disk spring friction clutch, the subgroup of which consists of a clutch cover and a disk spring a plurality of radially inwardly directed tongues near the radially outer ends the tongues on the clutch cover through a Plurality of projections is supported, which calibrate from the clutch cover through slots between adjacent tongues extend and detect the disc spring, in which process the disc spring leveled and each projection for holding the Disk spring on the clutch cover by means of a Forming tool is bent radially outward, characterized in that the clutch cover (11) is preformed with projections (17) parallel to the axis (30) of the plate spring (16) and each projection (17) in the area in which it passes through the plate spring (l6), during its radially outward directed Itabiegung is held against a radially inward displacement. - 19 - 709817/0363 2. The method according to claim 1, characterized in that that the projections (17) are held by stop members (31, 56) which are fixed in their mutual position. 3 · The method according to claim 2, characterized in that the stop members (56) with the molding tool are connected. 4. The method according to claim 2, characterized in that that the stop members (31) with the support (25, 6l) for the clutch cover (ll) are connected. 5. The method according to claim 1, characterized in that that the projections (17) by means of trailing links £ 95 »961 97) with the forming tool (II9) in are ¥ irkverbindung, are held in the holding position displaceable stop members (86). 6. The method according to any one of the preceding claims for a sub-group ax a link ring made of wire on the the side of the plate spring opposite the clutch cover, the one after the bend of the projections is detected characterized in that the articulation ring (2l) during the bending of the projections (17) against a radial outward displacement is retained. 7 «Method according to claim 6, characterized in that that the pivot ring (2l) with respect to the areas covered by the projections C17) by circumferentially spaced each other on a retaining ring (4l) formed claws (45) is held and that the support ring (4l) after the bending of the projections (17) and after turning into a position in which the recesses (46) between the - 20 - 709817/0363 The claws (45) are aligned with the projections (17) is pulled past the projections (17), 8. The method according to claim 6, characterized in that the articulation ring (2l) opposite to that of the Projections (17) captured areas by abutment (71) is held by with the molding tool (66) operatively connected trailing elements (77 »78) are brought into position. 9. Device for performing the method according to one of the preceding claims with a device for Leveling of the disc spring and with a molding tool for radially outward bending of the projections, whereby the disc spring is held on the clutch cover, characterized in that stop members (31 »56, 86) are provided that the projections (17) in the area in which they run through the plate spring (16) during the radially outward bending hold against a radially inward displacement. 10. The device according to claim 9 »characterized in that that the stop members (31 * 56) are in a mutually fixed position. 11. The device according to claim 10, characterized in that the stop members (56) with the molding tool (5 ^) are connected. 12. The device according to claim 10, characterized in that the stop members (31) with the support (25, 6l) for the clutch cover (ll) are connected. 709817/0363 -21- Λ- 13 · Device according to claim 9 »characterized in that the stop members (86) in one position each hold a projection (17) and that are in operative connection with the molding tool (119) Follower links (951 96, 97) for adjusting the Stop members (86) are provided. 14. Device according to one of claims 6 to 8 and 9 to 13 »characterized in that brackets (45» 71 »132) the pivot ring (2l) during the bend hold the projections (I7) against a radially outward displacement. 15. The device according to claim Ik _1, characterized in that the holder is formed by circumferentially spaced apart on öinem retaining ring (4l) formed claws (45) which limit the recesses (46). for pulling off the retaining ring (4l) over the bent projections (17) are aligned with the projections (17) after it has been rotated with respect to the clutch cover (ll). 16. The device according to claim 14, characterized in that that the holder is formed by abutments (71) and in operative connection with the molding tool (66) upright trailing elements (77-78) are provided to move the abutments (71) into their respective working positions bring in. 709817/0363